<template>
	<view v-if="goods_info.goods_name" class="goods-detail-container">
    <!-- 轮播图区域 -->
		<swiper :indicator-dots="true" :autoplay="true" :interval="3000" :duration="1000" :circular="true">
		  <swiper-item v-for="(item, i) in goods_info.pics" :key="i">
		    <image :src="item.pics_big" @click="preview(i)"></image>
		  </swiper-item>
		</swiper>
    <!-- 商品信息区域 -->
    <view class="goods-info-box">
      <!-- 价格 -->
      <view class="goods-info-price">￥{{goods_info.goods_price}}</view>
      <!-- 商品的名称和收藏 -->
      <view class="goods-info-body">
        <!-- 名称 -->
        <view class="goods-info-name">{{goods_info.goods_name}}</view>
        <!-- 收藏 -->
        <view class="shoucang">
          <uni-icons type="star" size="18"></uni-icons>
          <text>收藏</text>
        </view>
      </view>
      <!-- 运费 -->
      <view class="yf">快递：免运费--{{cart.length}}</view>
    </view>
    <!-- 商品图文详情 -->
    <rich-text :nodes="goods_info.goods_introduce"></rich-text>
    <!-- 商品导航区域 -->
    <view class="goods-nav">
      <uni-goods-nav :fill="true" :options="options" :buttonGroup="buttonGroup" @click="onClick" @buttonClick="onButtonClick"></uni-goods-nav>
    </view>
	</view>
</template>

<script>
  import {mapState, mapMutations, mapGetters} from 'vuex'
	export default {
    computed: {
    // 调用 mapState 方法，把 m_cart 模块中的 cart 数组映射到当前页面中，作为计算属性来使用
    // ...mapState('模块的名称', ['要映射的数据名称1', '要映射的数据名称2'])
    ...mapState('m_cart', []),
    // 把 m_cart 模块中名称为 total 的 getter 映射到当前页面中使用
    ...mapGetters('m_cart',['total'])
  },
  watch:{
   total: {
     handler (newVal) {
         const findResult = this.options.find((x) => x.text === '购物车')
         if (findResult) {
           findResult.info = newVal
         }
     },
     immediate: true
   }
  },
		data() {
			return {
        // 商品详情对象
				goods_info: {},
        // 商品导航信息
        options: [{
          icon: 'shop',
          text: '店铺'
        },{
          icon: 'cart',
          text: '购物车',
          info: 0
        }],
        buttonGroup: [{
          text: '加入购物车',
          color: '#fff',
          backgroundColor: '#ff0000'
        },{
          text: '立即购买',
          color: '#fff',
          backgroundColor: '#ffa200'
        }]
			};
		},
    onLoad(options) {
      console.log(options)
      this.getGoodsDetail(options.goods_id)
    },
    methods: {
      ...mapMutations('m_cart', ['addToCart']),
      // 获取商品详情数据
      async getGoodsDetail (goods_id) {
        const {data: res} = await uni.$http.get('/api/public/v1/goods/detail', {goods_id})
        if (res.meta.status !== 200) return uni.$showMsg()
        res.message.goods_introduce = res.message.goods_introduce.replace(/<img /g, '<img style="display:block"').replace(/webp /g, 'jpg')
        this.goods_info = res.message
      },
      // 点击放大图片
      preview (i) {
        uni.previewImage({
          current: i,
          urls: this.goods_info.pics.map(x => x.pics_big)
        })
      },
      // 点击跳转购物车
      onClick (e) {
        console.log(e)
        if (e.content.text === '购物车') {
          uni.switchTab({
            url: '/pages/cart/cart'
          })
        }
      },
      // 加入购物车
      onButtonClick (e) {
        if (e.content.text === '加入购物车') {
          // 组织一个商品对象
          // { goods_id, goods_name, goods_price, goods_count, goods_small_logo, goods_state }
          const goods = {
            goods_id: this.goods_info.goods_id,
            goods_name: this.goods_info.goods_name,
            goods_price: this.goods_info.goods_price,
            goods_count: 1,
            goods_small_logo: this.goods_info.goods_small_logo,
            goods_state: true
          }
          this.addToCart(goods)
        }
      }
    }
	}
</script>

<style lang="scss">
swiper{
  height: 750rpx;
  image{
    width: 100%;
    height: 100%;
  }
}
.goods-info-box{
  padding: 10px;
  padding-right: 0;
  .goods-info-price{
    color: #C00000;
    font-size: 16px;
    margin: 10px 0;
  }
  .goods-info-body{
    display: flex;
    justify-content: space-between;
    .goods-info-name{
      font-size: 13px;
      margin-right: 10px;
    }
    .shoucang{
      width: 120px;
      display: flex;
      flex-direction: column;
      border-left: 1px solid #efefef;
      align-items: center;
      justify-content: center;
      font-size: 13px;
    }
  }
  .yf{
    color: gray;
    font-size:13px;
    margin: 10px 0
  }
}
.goods-nav{
  position: fixed;
  bottom: 0;
  left: 0;
  width: 100%;
}
.goods-detail-container{
  padding-bottom: 50px;
}
</style>
